. >>> we are getting word this morning that scotland yard has made an arrest in the scandal that has rocked rupert murdoch's media empire and yet another remainor how serious the hacking investigation is. london's top police officer faces a public grilling today. dan rivers is on that for us. dan, what do you think? >> reporter: paul stevenson, the top policeman in the uk, is being questioned at the moment by the metropolitan police authority. particularly coming under pressure because, this morning, they arrested a former deputy editor i "the news of the world" neil wallace, arrest number nine as part of this and the other inquiry into corrupt or bribing police officials for information. now, the important thing is here is already we know one of the senior policemen in scotland yard john yates has already admitted having lunches with neil wallace, the man now arrested. a lot of pressure on one senior policeman, john yates, therefore, top pleasure on the top policemen. rupert and james murdoch are hounded in the people behind the building me to come and appear and justify what happen